Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd03d8615bdc50cd0dcd71d5e6542ded8253d0eb16fd3d6674129e33d6465253' 
  AND token = 'teXV1lEikc3qHgLUgXSH27ClE/Q4lgxfXeI3ZiCMOLA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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