Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a02835d7a5be404090c1a4bab8d2bb00ce6eedb9536e1d7327ca69818d37b15' 
  AND token = 'H/PWhywC/gDdndPNT1A+0/kjXwjFfI4noLFTh/W6wdM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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