Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f40c2c7e624d11ece300a352c0681e7cd914d79e007afa6f93cd30be8359c9ec' 
  AND token = 'Vrbq2r6yMy1lAhFTHjCQVRJHalbHdU1LO/B7w5SRvUY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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