Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5184c8c133e20de5d71f4a7af237389a1ddfccbf8b8d1b613efe8b93ddd3ca4' 
  AND token = '5dvEehVsv6X+CX0bTSHjtw9DiWOV8cYn4kSiK58NRMs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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