Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e8345bcca9ec66c36c99a9229ffc4f4d8cd634d82f8d35c20cfd158a24462c5' 
  AND token = 'FGh4zHmWkEqw+6EVYcAZX9MbKGc6AfPAPUXyejcGRig=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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