Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d6c3d99901bd6ef62b99a42a0b0de4c3b6b7ae7ce186e5cc33aa6afe6c9bb66' 
  AND token = 'XLgc4WVzibVor6E/jeAeqbd6jBe6WQpCdQSa3zoOVHc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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