Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4db938743284256d26a27abf2d2baef868ae2a00aa90c8112a64a2a6f8101427' 
  AND token = 'S3KcJc3J5wj4LNPsDWEb84+E9w5nj8JagjTxptwqBUw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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