Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd90184fc02e49156480a429d6305a7083486f5873ed6c3c3742566c368d0bbdf' 
  AND token = 'Vns6daLqSJaMkJ34uvbxfxSk7VnPO0AlcmbNLhwAo24=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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