Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9c558543dfdc5c11c25062f7a88ab819c94ccfa9357fe02428c668e81cb47799' 
  AND token = 'g3DhB55xUYBEMwAR8J0XVst1XDEvh5R3kiPmVW7Jn5c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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