Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2c19578775d12e0cb2d2544e75fde9d91fdbbb65fbdf256e36c1a17c5991087' 
  AND token = 'tGO/pAFuYTj7Ao5z0r16b15cIwVYGBEsl6SgP0IL+48=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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