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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8bea7d5f71272596bad4f9672c7185ebd98154c9df4c2b2e2febfbb1080090f9' 
  AND token = 'qLGkwUuacAWFjyW6H/gexzyU6eHpK0EjHoqsxrGbfsg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}