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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c0035e157c92ba5500ee2b6a465ca3437081b2237337f9088517712c11dd0ca' 
  AND token = 'nqcm3psyB7Ekl36a3uJpeJZIgerVRC22N6MRjc8xLjA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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