Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66a5d267934217cacc4467c1a70291f2e9cfd812635aaef213fa8b7ca49efc03' 
  AND token = 'E304fqF6TK36pqSgRbm305XFxa05rhNciuxoZkjtwfg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00118

JSON explain

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