Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '236592346d53c04a64cfbf6cc50d97d1ff7c88ad8c493fdfc3da7e656623860c' 
  AND token = '+koH2jdyPpoQDoEfHMwqHtSFFfs0ddvsUo5pigZ3fgA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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