Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d333ff1346b7e56c65cf3ecb6fcb595775d9f2db073fdc8bf04a0ec1e0ee5ae' 
  AND token = 'M2XJ+oOZy/Rd/XNTu21cMBHR+Vfc5XG0760fd1bd46A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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