Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98d72f48bf2428955896c5fec11723bd63442adc447dc0e94cad233fcacdfb46' 
  AND token = 'K0mlFTbXz5uyhkZXyZBZr2Vmceh2XW0Aqso6mslh6cM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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