Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9709bd83038db06a27870b9cf936d0613971a25e26b5a02d753232430a3a5b57' 
  AND token = 'rNFYM7xqkCxmnZaYZ1iMoPDdwULCCk8v6RTQ+FXAiS8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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