Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d3dedabc839e4347992826811a9745a65f69f728522f5fc5f6990ca0bc88d12' 
  AND token = 'STFO1daPhNM8OY5ClkPbTxr0ErLPmxLVH6v4Op5wfEo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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