Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6302b026b79ada904781ee4225e34735d571e31a8d09eabb7495bb03d514ce19' 
  AND token = 'b6Atboe8XGNNxGTIHC1QJI2aaLYwDLPqfZMufFTx8+8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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