Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4fbc29f0956cefceb9f9e51a169f9165eadb9330db03d4c2f0a1e7ae6d378b92' 
  AND token = 'qujHTfkpDIu1ABSpN4FIJv+aVH0yImRDG9gnEHo7/So=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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