Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02cf63a696f53ae7fd86b49dca2f2ae6727b7a98b5810b30b15e43d5be3b3ed3' 
  AND token = '6SJI+bzSC1jNFb/QXMsksQIvwYd+oo08yF7DKPcQNyY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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