Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '283f6de3c48a431107472a84e688877b2117ec81680cfd12e5a02cf455bcb019' 
  AND token = 'IVXQHno/X+o0z1BA7wrMreGU9ma0Nl4zPQYt9FJTcCY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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