Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '03307af9501111de61163e56eb9ced6850ccf859837d97c464464f84e0a0f834' 
  AND token = 'jOpYmLzfDsMkIrJ/jx0am8BCl2/ZJne399anKdBiEfk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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