Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a61956197dd92c54480c2074488a090b45f461eec53f63ac68a3997e74f03eb' 
  AND token = 'VPco9CT3n7SpY8ncZfY2XYgBsB+cmy2GqtiQcY5OTjM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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