Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc599e9283aebe7458aa17cf69ae48eba4bced56236afd8ecf1fc0a133760352' 
  AND token = 'y4sSSIbCqP72GqmPjn3la1sx90hNX/d2KSK7DohmJ+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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