Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce5bc1fdc34d4be2a85490e48340b0675bcf6f4b66eca224e98e9f23d89e60d1' 
  AND token = '0tyd1uZ2sbewTqh96I9ItqLH0GsOzvZnGHfVzZ28Gsk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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