Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '438fcc083a7dfd3ba323ca92722772241da9688e46bfb57af402ee6809406299' 
  AND token = 'tTCi4Kc1fogkHDI75lQWv9r3mE3SFJipKJrzBlZo4dE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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