Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f9aa6f15f95831d1fede00d4103b317fffb5087b385f4008ffd07761fcdc3b3' 
  AND token = 'vjxxrKfRDLKOECWC5U/Jv39I4X4/vWXn+IP3msUs/zc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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