Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '558e466f673a0c61589c74fccc341220e0082a45d6421b2c96b817bca7b97ec2' 
  AND token = '2bY2Rv0nHwE7hAWAvgAdMIQObtksju9VMPwGPMaCPf0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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