Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4b489ebe5730890f3d3dfda9ba0d941549e1772dc81899dad0da7b51fd903eb3' 
  AND token = 'CTgl/GgjzAy5xPLtYPTPIp3Z//dCnxgbbwpVMOHaGqA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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