Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11e490905f15f71dd95c92c53b0a339a637e85d760c8bf7627dac6c93f29aad3' 
  AND token = 'TzpJqwaZrOcTX+9qiPafKCpvx0UEhj8unQ5F1SndmQk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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