Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '114a8c705d4bf8511208f887da7cf1a9b2ac2ac2031dfdf47cfb2731b666a3dc' 
  AND token = '9AOg9EvTLbHIZcYd9ma5k7lSK2rID9jHdbOwDUicurI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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