Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4f4fa8d9356518cad83b34f148a488c3c56ff6862be622e61087ec2bb94a6ab' 
  AND token = 'KBm573j9T1UZEdKmU3sKBPw79i7PpSyqFkFGA8Clzl8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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