Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e7b1f48755329d1d82d52ddb86aada2f511dad7cf873fa478f1bf85b29ff8f6' 
  AND token = '3nC8Xda7HaKijWnAh6p4OBFhfUhyv+vsOhawr0KT9ic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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