Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83845bda97847c02c30c9160618e6d9ff7cdbbf1f39de61df293a0889a50d479' 
  AND token = 'Z29ZvcmaYkMtRfEUmHIDMuKtsaocJWOEjh/CKY+C67Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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