Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'e6d5e8c2f8aa13895995659e413c5c6c5f0d635c797da327c0e256abb3a81ab0' 
  AND token = 'F1k2HiQ9vST2sbcQeIWJeizAYWbHbxnFUzjpQFakaJU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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