Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4e437e486db823bfb327544fbf83cfcb8bbf923e19fe6e4c34a1c289fef335c' 
  AND token = 'jV6KsdvYUiSyeZtalr5Pvv4UmLAOMK2drqJ6a2kYcLE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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