Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1c2680a144116ff690bbdf2c88eb41b535210c6bcc3caf122cc0cdde0b39d2c' 
  AND token = 'wiasnw6i1euHF7vJ2ubrA9NML3latdZ8HElLg/XG+hU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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