Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '143522916f002f90b96c74212ed1b47757ebdfcf68b06d3913bd4559312e408f' 
  AND token = 'uzHhrCyV7/TL19z5V8NrQ62VX8qC1XhS8HoDb7SGNPs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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