Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97428f5a0781d03a133a77fda019f6f0c8d3e3d1ff42752f0a9582c486c4c926' 
  AND token = 'iKf3aqrzgJcV3/kY4y9m5I0Z/6EpScjn7yc1eJu+92M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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