Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '9d5f08755fa20661b9598eecf28c458ae8c78121f4d485b509f71e878b971202' 
  AND token = 'Biofsu/+Fbk4k9dS9UxG1tS69mcHicLs5ug1car+Zjw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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