Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10b39203770ad4202dc60114c0ef40cff5d73f74ebfcdc32277436821ea3aaf9' 
  AND token = 'rj82XGtNd0nNnrzRkYw/1od0IbVl3Uv7/xB17Fz3S74=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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