Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'de1a7bb3da2a9ad928ab3001b46286f8b920d297ea8ae4aeecf0e6bb8e815bf9' 
  AND token = 'X5aY2cjwImtL0cf1mlvmijd/6vezHmDfennYrLWqRTM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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