Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3a198e295eaf7ee9290e6ed5b3cd4bf166727939222c9a9532b4a77a81fbcc5c' 
  AND token = 'czan76Gf9oT7dH8ttKXGLwZLhGFhKjjAokkK7JPtL8c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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