Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f87cec08cf5f3ee0d8675fadb74d10327c91c172aa3fb9929c6774e77f25199' 
  AND token = 'D1qX1F6toi4RCNOKuQoxDtSCSD/pcmLtUvRsfIK3Qdc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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