Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9f7ee24111112f046600f1259e74b4ee65aecd8f709c8ce546f3f3194f880218' 
  AND token = 'LBYksrwjJTZwjxUAra4VynjiI65lY0Ez4Cns1cGfxaA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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