Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab5ffff1c507da3109b1bfccd0ef18314ae457e4be61f30d4523c535e96c8ccb' 
  AND token = 'zLJnwdDabCxJZdnrGDtdpFE8CYFF9Zm+scVqyujyQvQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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