Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79cbcccf74a74b7be3818c5cf4bd0fe17d11ff0770630197afa30d3a734a96af' 
  AND token = 'OZVas+mhccin3O2G2vDQTxM45LBDX3H9djKx1Ssi2YQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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