Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'daf255f275efde1c0537c972ad5e383b329e5136ecb9084389af98e40684f599' 
  AND token = 'lpT2qVLD6Kd5q7m0Z2Nv+iHYE89Lqk6zZ75F2bhDcdE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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