Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc509cb8a164431922e7e744ca153d52feaffe2752e1acd7250b645b75fb58ab' 
  AND token = 'CXmzBR/IxUQRsP2ctrGDvjoldSbvHHJeLZncALoEWJ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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