Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97f94b59a6580a7daf88e99cbf30f26cb08936cedd62a0679d113dd6f679b379' 
  AND token = '6omuHRjBWpyqwe3bHA9jhgLGxzbjCbgaWtPPMhluRw0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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