Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2b4a3ee805ed4d6093851fc86632cfb2a57a5baf8d446f7a33d6016f437b487' 
  AND token = 'xpMMjnHVo2r7RhxlDbppTM9TCrIycvg9W4WK/QZm1uM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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