Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63a1eff82cf6138f402d5497079cfe3ef20f4b87c961d6524c58028d6d455e8d' 
  AND token = 'pdmW0sy6fegm3rcmxLd7x21cjiSuwxr4ee+ygbMODq4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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