Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4fac1a6130840a2ebf4a0f2b1d239b6f8005bc15172640ddf90723a2b7aca067' 
  AND token = 'gb/G0dDwdEUU0lfksltwmC6jtLVI5I3sDZIjyags+aA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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