Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd717b15a0a8c65a90c912fd3dfbbd7ef220a1bcd4f764a59561d8aa8b60f4ed4' 
  AND token = 'wuvIAdyAet3WvAY+THMM6ldE3Ry+r5OpYUQBpXqyRLc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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