Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b53e580a0137d1cf90893fa4f2c726f7b108028c3548f61d9f02899304afd207' 
  AND token = 'Ok2hFLp8PNBOnWShGKU6fRs2Trajdo0gjmame+74EeU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}