Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fea188d13fcf5e26d769d2437cb564aee7c24a5e2b2db7dc8785256f3e588e42' 
  AND token = 'rvd7I/946TLbCC7GV94KsK1xGyh67CYSeNrWBU21uJc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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