Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10310e769fb14de0c06dc530b12caf741428a86fb6c0ae8fe8fac1554cebd9fd' 
  AND token = '4Bdb9y7mpJG/0n7OrvLx3mEKO1xovREKvH6QtCu9JfE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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