Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bd48e641b0166ecad1d5e8f3b204af0cd5333bad2e92d3401ac6aa2ffc1e33b' 
  AND token = 'C5HkybYVRBQhHuxuwYhzFTtLuwidC81w4j55+nEaYh0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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