Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de578767ea1a9e833457b6cac70496951244aebabd3d8bcc373bdf5599608b8d' 
  AND token = '0yrLdimUBMtNoZO36KLuMOhr6/IcuBxhUNJoueIYFPA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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