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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6de0cd2585281abd5e6d75a56951ad5c35525fbe62e77fbca5a0c100cf60a30e' 
  AND token = '9eYyodm+wNePooDnV3AAeIoIFU1Jycl9AfbTCP+HcgU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}