Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2284c8f2879b03ed21203beda9f016315c65be402b8f3c8d460916bb455fa788' 
  AND token = 'xXjIPSgvEhTWYeUCjM5O8RCkaA0A0pi0vmls6M2srH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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