Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28faba409fbb04b8ab67777e2432b1c45bb243e0d496a57a9be3955da7b0219b' 
  AND token = 'omdLaCulJMIdzI8wiwYVRw2hdVgG3tUn0cleDRjppAc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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