Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '087be77d345e941a30a53afc8240ad43a3bf57fd4e392e020919d5be32fa4ba5' 
  AND token = 'O0RURnOhjSxFbaLnYiu3Muop5y9A7WhoATE55x/QlwM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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