Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86c651d9a673304340b6fc31d2a404ae0b58f331aaf0391791919cc1abd2a659' 
  AND token = 'x7Ge2Gy6EiAlxn2iZXTHBys7cQxO7sE9OVrp4DyHaFs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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