Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff2019bc282e403277b392c630adf49896b4385a37848dd6b5915c2790b11524' 
  AND token = 'OWC8fkBTEFH1z/b588LN/p8F7NbB5Q5bmrdWyDOhV9c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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