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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a2502841955dd25e3dd941a55743eb7c0b96a81a852f0bd5326c8411d4177fe' 
  AND token = 'IfR1M89HtnnfN5wubhC3rZUwQ4CVqADf7K6iA6J4aDw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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