Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20258c5acd49a58516b2f50dfec670e0a5acd6cc8eec3df1e2998014928cb45f' 
  AND token = 'mWiCZbYd96qchxTK/rRKz58SPdk2wMWUBX2B8WD1qdM=' 
  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"
    }
  }
}